Wouldn't really make any sense to do until Google adds native pen support and apps to Android. To my knowledge this has not happened yet. But with the growth of the Note/Phablet market, it very well may come in one of the next updates.

I don't even mean an update to the Note 2, I mean a total different product. A Nexus Phablet would be a cool product that would most DEF sell a good amount. I personally would buy it. Who knows, maybe Google and Motorola are cooking up something behind the scenes as we speak for the future...